David debugged: Investigated new Notre Dame signup with empty home page despite successful calendar runs

David noticed a fresh signup from Notre Dame was showing a blank home page and opened a multi-threaded investigation:

there's been a new signup from someone at notre dame university just now. i want you to go and investigate the bootstrap that has or hasn't happened for them and investigate what's going on. did the calendar agents for all their courses run and complete successfully? did kerra create events in their calendar herself? what about the monitor tlr and the assignment planners and the module planners? what's going on with those? why haven't those succeeded? he can't see any workspace candidates on his home page so there's something going wrong. go and figure it out

The investigation revealed that the user's Spanish course content was stored exclusively as Google Slides links inside Canvas page topics, with no actual file uploads — a case the lecture pipeline had never handled. David then traced the scope of the problem across all five of the user's courses, discovering a mixed landscape: some courses had unlinked file topics, others had external link dependencies.